CN113308931B - Aramid nano paper and preparation method thereof - Google Patents
Aramid nano paper and preparation method thereof Download PDFInfo
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- CN113308931B CN113308931B CN202110595381.2A CN202110595381A CN113308931B CN 113308931 B CN113308931 B CN 113308931B CN 202110595381 A CN202110595381 A CN 202110595381A CN 113308931 B CN113308931 B CN 113308931B
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H13/00—Pulp or paper, comprising synthetic cellulose or non-cellulose fibres or web-forming material
- D21H13/10—Organic non-cellulose fibres
- D21H13/20—Organic non-cellulose fibres from macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- D21H13/26—Polyamides; Polyimides
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/03—Non-macromolecular organic compounds
- D21H17/05—Non-macromolecular organic compounds containing elements other than carbon and hydrogen only
- D21H17/09—Sulfur-containing compounds
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/20—Macromolecular organic compounds
- D21H17/21—Macromolecular organic compounds of natural origin; Derivatives thereof
- D21H17/24—Polysaccharides
- D21H17/30—Alginic acid or alginates
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/63—Inorganic compounds
- D21H17/64—Alkaline compounds
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21J—FIBREBOARD; MANUFACTURE OF ARTICLES FROM CELLULOSIC FIBROUS SUSPENSIONS OR FROM PAPIER-MACHE
- D21J5/00—Manufacture of hollow articles by transferring sheets, produced from fibres suspensions or papier-mâché by suction on wire-net moulds, to couch-moulds
Abstract
The invention discloses aramid nano paper and a preparation method thereof, wherein the preparation method comprises the following steps: mixing aramid fiber, dimethyl sulfoxide, alkali liquor and sodium alginate solution to obtain nano-level uniform mixed fiber suspension; carrying out reprotonation treatment on the uniformly mixed fiber suspension to obtain uniform micro-nano fiber dispersion liquid; preparing the aramid nano paper by using uniform micro-nano fiber dispersion liquid; according to the method, an alkali liquor-sodium alginate system is adopted, so that the internal hydrogen bonds of aramid fiber molecules are damaged, the amide bonds of the aramid fiber molecules are broken, the surfaces of the aramid fiber molecules are negative charges, and the aramid fiber is nanocrystallized through electrostatic repulsion among fibers; the uniformly mixed suspension is subjected to protonation treatment again, so that the preparation period of the aramid nanofiber is effectively shortened, and a medium is provided for the homogeneous phase of sodium alginate; the strength and toughness of the aramid nanofiber paper are effectively improved, and the breakdown strength of the aramid nanofiber paper is high.
Description
Technical Field
The invention belongs to the technical field of paper industry and polymer nano materials, and particularly relates to aramid nano paper and a preparation method thereof.
Background
The aramid fiber is used as a high-performance synthetic fiber, has excellent mechanical property, chemical stability resistance, thermal stability, insulativity and self-extinguishing property, and can be applied to the fields of aerospace and military industry as a light high-strength structural member made of the aramid fiber; the aramid fiber as an insulating material can be applied to high-voltage devices such as motors, transformers, capacitors and the like; at the same time, it can also be used as protective clothing due to its high temperature resistance and self-extinguishing properties. With the development of extra-high voltage, higher and higher requirements are put forward for materials in the insulation field, which means that the performance optimization of the traditional aramid fiber paper has important economic benefits and social significance and is also great tendency.
In 2011, the Kotov topic group proposes that aramid fibers (PPTA) are vigorously stirred for a week in a potassium hydroxide and dimethyl sulfoxide (DMSO) system, and through a deprotonation process, the surface of the aramid fibers is negatively charged, and electrostatic repulsion is generated between the fibers, so that the aramid fibers are successfully converted into Aramid Nanofibers (ANF); the aramid nano paper prepared from the ANF is considered to be superior to aramid paper in strength, toughness and insulating property; however, the traditional preparation method has a long period, the aramid nano paper has the rigid characteristic that the strength is less than 200MPa and the fracture deformation is less than 10%, and the rigid characteristic enables the aramid nano paper to be easily damaged in the application process.
At present, mechanical properties of aramid nano paper are rarely researched, and most commonly, various substances such as polymers are added into a prepared aramid nano fiber suspension in a blending mode; however, the method has the problem of poor compatibility between the polymer and an ANF system, and generally causes the strength and toughness of the aramid nano paper to be low.
Disclosure of Invention
Aiming at the technical problems in the prior art, the invention provides aramid nano paper and a preparation method thereof, aiming at solving the technical problem that the existing aramid nano fiber is poor in mechanical property and insulating property.
In order to achieve the purpose, the invention adopts the technical scheme that:
the invention provides a preparation method of aramid nano paper, which comprises the following steps:
mixing aramid fiber, dimethyl sulfoxide, alkali liquor and polymer solution to obtain nano-level uniform mixed fiber suspension;
carrying out reprotonation treatment on the uniformly mixed fiber suspension to obtain uniform micro-nano fiber dispersion liquid;
and preparing the aramid nano paper by using the uniform micro-nano fiber dispersion liquid.
Further, the mass ratio of the aramid fiber, the dimethyl sulfoxide, the potassium hydroxide and the polymer solution is 1:1.5:500: (0.005-0.1) in a certain proportion.
Furthermore, the aramid fiber is one of para-position chopped aramid fiber, para-position precipitation fiber, para-position pulp fiber and para-position aramid yarn.
Further, the polymer solution is a sodium alginate solution; the sodium alginate solution is obtained by dissolving sodium alginate in water, and stirring and mixing uniformly; wherein the concentration of the sodium alginate solution is 1-20mg/mL.
Further, the process of preparing the nano-scale uniform mixed fiber suspension is as follows:
mixing aramid fiber, dimethyl sulfoxide and alkali liquor to obtain a mixed system;
adding a sodium alginate solution into the mixed system, stirring to be dark red, and cracking aramid fibers to obtain the nano-level uniform mixed fiber suspension; wherein the stirring speed is 500-1000r/min, and the stirring time is 36-72h.
Further, the uniformly mixed fiber suspension is subjected to a reprotonation treatment process, which specifically comprises the following steps:
adding deionized water into the uniformly mixed fiber suspension, and stirring to remove foams to obtain uniform micro-nano fiber dispersion liquid; wherein the volume ratio of the uniformly mixed fiber suspension to the deionized water is 1 (3-5).
Further, the process for preparing the aramid nano paper by using the uniform micro-nano fiber dispersion liquid comprises the following specific steps:
and carrying out vacuum-assisted suction filtration and drying on the uniform micro-nano fiber dispersion liquid to obtain the aramid nano paper.
Further, the vacuum auxiliary suction filtration process adopts squeezing of the uniform micro-nano fiber dispersion liquid under the room temperature condition; drying at 100-110 deg.C for 5-10min.
Further, the alkali liquor adopts potassium hydroxide solution or potassium tert-butoxide solution.
The invention also provides aramid fiber nano paper which is prepared by adopting the preparation method of the aramid fiber nano paper; the tensile strength of the aramid nano paper is 214-308.23MPa, and the toughness is 12.95-42.33MJ/m 3 The breakdown strength was 71.71kV/mm.
Compared with the prior art, the invention has the following beneficial effects:
the invention provides aramid nano paper and a preparation method thereof.A lye-polymer system is adopted to realize the destruction of hydrogen bonds in aramid fiber molecules, so that the amide bonds are broken, the surface of the aramid fiber molecules is in negative charge, and the nano-crystallization of the aramid fiber is realized through the electrostatic repulsion among fibers; the uniformly mixed suspension is subjected to protonation treatment again, so that the preparation period of the aramid nano-fiber is effectively shortened, and a medium is provided for the homogeneous phase of the polymer; the polymer is used as a flexible macromolecule, and can be mechanically wound with the aramid nano-fiber, so that the aramid nano-fiber is improved in different degrees and different properties; due to the polyhydroxy and carboxyl on the surface of the polymer, a chemical bond can be formed with the amino on the surface of the aramid nano-fiber, so that the strength and toughness of the aramid nano-fiber paper are effectively improved, and the breakdown strength of the aramid nano-fiber paper is higher.
Furthermore, by adding a sodium alginate solution, the preparation period of the aramid nano-fiber can be shortened, and due to the homogenization of the aramid nano-fiber/polymer system, the prepared aramid nano-paper has a more regular structure and stronger binding force, and compared with the original blending, the mechanical property and the insulating property of the aramid nano-paper can be better improved, and the prepared aramid nano-paper has the advantages of light weight, high strength and high insulating property.
Drawings
FIG. 1 is a graph showing mechanical properties of the aramid nano-paper prepared in examples 1 to 4;
fig. 2 is a graph showing the insulation performance of the aramid nanopaper prepared in example 2.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects of the present invention more apparent, the following embodiments further describe the present invention in detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The invention provides a preparation method of aramid nano paper, which comprises the following steps:
step 11, mixing aramid fiber, dimethyl sulfoxide and alkali liquor to obtain a mixed system;
step 12, adding the polymer solution into the mixed system, stirring to dark red, and cracking the aramid fiber to obtain the nano-level uniform mixed fiber suspension; wherein the stirring speed is 500-1000r/min, and the stirring time is 36-72h.
Wherein the mass ratio of the aramid fiber, the dimethyl sulfoxide, the potassium hydroxide and the polymer solution is 1:1.5:500: (0.005-0.1); the aramid fiber is one of para-position short-cut aramid fiber, para-position fibrid, para-position pulp fiber and para-position aramid yarn; the polymer solution is a sodium alginate solution, and the sodium alginate solution is obtained by dissolving sodium alginate in water and uniformly stirring and mixing; wherein the concentration of the sodium alginate solution is 1-20mg/mL; the dissolving conditions of the sodium alginate are as follows: violently stirring for 7-8h at the temperature of 80-100 ℃ in an oil bath until the solution is light yellow, thus obtaining a sodium alginate solution; the alkali liquor adopts potassium hydroxide solution or potassium tert-butoxide solution.
According to the aramid nano paper and the preparation method thereof, the preparation method of the traditional aramid nano fiber is improved, and a polymer solution is added into a preparation system of the aramid nano fiber; the polymer and the aramid fiber nano-fiber are compounded, deionized water is used for protonation, and then vacuum-assisted suction filtration is carried out to obtain the aramid fiber nano-paper, and the prepared aramid fiber nano-paper has the advantages of simple preparation process and excellent mechanical property and insulating property; wherein the tensile strength is 214-308.23MPa, the toughness is 12.95-42.33MJ/m 3 The breakdown strength is 71.71kV/mm; the aramid nano paper prepared by the invention has good self-extinguishing performance, and can be used for manufacturing high-end electrical insulating materials and fire-fighting protective clothing.
Example 1
The embodiment 1 provides a preparation method of aramid nano paper, which includes the following steps:
Adding a proper amount of sodium alginate into deionized water, and vigorously stirring for 7 hours at the temperature of 80 ℃ in an oil bath at the stirring speed of 500r/min until the solution is light yellow to obtain a sodium alginate solution; in this example, the concentration of the sodium alginate solution was 1mg/mL.
Mixing the para-position chopped aramid fiber, dimethyl sulfoxide and a potassium hydroxide solution to obtain a mixed system; then adding a sodium alginate solution into the mixed system, stirring to dark red at room temperature, and cracking aramid fibers to obtain the nano-level uniform mixed fiber suspension; wherein the mass ratio of the aramid fiber, the dimethyl sulfoxide, the strong base and the sodium alginate solution is 1:1.5:500: a ratio of 0.005; wherein, the stirring is carried out for 24 hours, and the stirring speed is 1000r/min.
Adding deionized water into the uniformly mixed fiber suspension; adding deionized water serving as a proton donor to protonate the surface of aramid nanofiber, re-agglomerating the aramid nanofiber into micro-nano aramid fiber due to the action of internal hydrogen bonds, and then mechanically stirring and removing foams to obtain uniform mixed dispersion liquid; wherein the volume ratio of the uniformly mixed fiber suspension to the deionized water is 1:3.
Step 4, aramid fiber nano paper preparation
Carrying out vacuum-assisted suction filtration on the uniform micro-nano fiber dispersion liquid, and then drying to obtain the aramid nano paper; wherein, the vacuum auxiliary suction filtration process adopts the method that the uniform micro-nano fiber dispersion liquid is squeezed under the condition of room temperature, and the vacuum degree is less than 0.1MPa; and (3) drying at 110 ℃ for 8min.
Example 2
The embodiment 2 provides a preparation method of aramid nano paper, which includes the following steps:
Adding a proper amount of sodium alginate into deionized water, and vigorously stirring for 8 hours at the temperature of 100 ℃ in an oil bath at the stirring speed of 500r/min until the solution is light yellow to obtain a sodium alginate solution; in this example, the concentration of the sodium alginate solution was 20mg/mL.
Mixing the para-precipitation fiber, dimethyl sulfoxide and a potassium hydroxide solution to obtain a mixed system; then adding a sodium alginate solution into the mixed system, stirring to dark red at room temperature, and cracking aramid fibers to obtain the nano-level uniform mixed fiber suspension; wherein the mass ratio of the aramid fiber, the dimethyl sulfoxide, the strong base and the sodium alginate solution is 1:1.5:500: a ratio of 0.017; wherein, the stirring is carried out for 72 hours, and the stirring speed is 500r/min.
Adding deionized water into the uniformly mixed fiber suspension; adding deionized water serving as a proton donor to protonate the surface of aramid nanofiber, re-agglomerating the surface of aramid nanofiber into micro-nano aramid fiber due to the action of internal hydrogen bonds, and then mechanically stirring and removing foams to obtain uniform mixed dispersion liquid; wherein the volume ratio of the uniformly mixed fiber suspension to the deionized water is 1:5.
Step 4, aramid fiber nano paper preparation
Carrying out vacuum-assisted suction filtration on the uniform micro-nano fiber dispersion liquid, and then drying to obtain the aramid nano paper; wherein, the vacuum auxiliary suction filtration process adopts the method that the uniform micro-nano fiber dispersion liquid is squeezed under the condition of room temperature, and the vacuum degree is less than 0.1MPa; and (3) drying at 110 ℃ for 10min.
Example 3
The embodiment 3 provides a preparation method of aramid nano paper, which comprises the following steps:
Adding a proper amount of sodium alginate into deionized water, and vigorously stirring for 7.5 hours at the temperature of 90 ℃ in an oil bath at the stirring speed of 500r/min until the solution is light yellow to obtain a sodium alginate solution; in this example, the concentration of the sodium alginate solution was 13mg/mL.
Mixing para pulp fiber, dimethyl sulfoxide and potassium tert-butoxide solution to obtain a mixed system; then adding a sodium alginate solution into the mixed system, stirring to dark red at room temperature, and cracking aramid fibers to obtain the nano-level uniform mixed fiber suspension; the aramid fiber, dimethyl sulfoxide, strong base and sodium alginate solution are mixed according to a mass ratio of 1:1.5:500: a ratio of 0.1; wherein, the stirring is carried out for 54 hours, and the stirring speed is 800r/min.
Adding deionized water into the uniformly mixed fiber suspension; adding deionized water serving as a proton donor to protonate the surface of aramid nanofiber, re-agglomerating the surface of aramid nanofiber into micro-nano aramid fiber due to the action of internal hydrogen bonds, and then mechanically stirring and removing foams to obtain uniform mixed dispersion liquid; wherein the volume ratio of the uniformly mixed fiber suspension to the deionized water is 1:4.
Step 4, aramid fiber nano paper preparation
Carrying out vacuum auxiliary suction filtration on the uniform micro-nano fiber dispersion liquid, and then drying to obtain the aramid nano paper; wherein, the vacuum auxiliary suction filtration process adopts the method that the uniform micro-nano fiber dispersion liquid is squeezed under the condition of room temperature, and the vacuum degree is less than 0.1MPa; and (3) drying at 105 ℃ for 8min.
Example 4
The embodiment 4 provides a preparation method of aramid nano paper, which includes the following steps:
Adding a proper amount of sodium alginate into deionized water, and vigorously stirring for 7 hours at the temperature of 100 ℃ in an oil bath at the stirring speed of 500r/min until the solution is light yellow to obtain a sodium alginate solution; in this example, the concentration of the sodium alginate solution was 6mg/mL.
Mixing para-aramid yarn, dimethyl sulfoxide and potassium tert-butoxide solution to obtain a mixed system; then adding a sodium alginate solution into the mixed system, stirring to dark red under the condition of room temperature, and cracking aramid fibers to obtain the nano-level uniform mixed fiber suspension; wherein the mass ratio of the aramid fiber, the dimethyl sulfoxide, the strong base and the sodium alginate solution is 1:1.5:500: a ratio of 0.05; wherein, the stirring is carried out for 36 hours, and the stirring speed is 500r/min.
Adding deionized water into the uniformly mixed fiber suspension; adding deionized water serving as a proton donor to protonate the surface of aramid nanofiber, re-agglomerating the aramid nanofiber into micro-nano aramid fiber due to the action of internal hydrogen bonds, and then mechanically stirring and removing foams to obtain uniform mixed dispersion liquid; wherein the volume ratio of the uniformly mixed fiber suspension to the deionized water is 1:5.
Step 4, aramid fiber nano paper preparation
Carrying out vacuum auxiliary suction filtration on the uniform micro-nano fiber dispersion liquid, and then drying to obtain the aramid nano paper; wherein, the vacuum auxiliary suction filtration process adopts the method that the uniform micro-nano fiber dispersion liquid is squeezed under the condition of room temperature, and the vacuum degree is less than 0.1MPa; drying at 100 deg.C for 10min.
As shown in attached figures 1-2, a mechanical property diagram of the aramid nano paper prepared in examples 1-4 is given in attached figure 1, and a comparison diagram of the insulating property of the aramid nano paper prepared in example 2 and the existing aramid nano fiber is given in attached figure 2; as can be seen from fig. 1 and fig. 2, compared with the original aramid nano paper, in examples 1 to 4, the mechanical properties of the composite nano paper are significantly improved by adding sodium alginate, the breakdown strength is higher, and the composite nano paper also has self-extinguishing property. The preparation method is characterized in that sodium alginate is introduced in the preparation process of the aramid nano-fiber, the compatibility and the uniformity between two phases are improved to a great extent, the surface of the sodium alginate contains a large number of active functional groups, covalent bonds and hydrogen bond crosslinking can be generated between the sodium alginate and amino groups and a small part of carboxyl groups on the surface of the aramid nano-fiber, the sodium alginate is a flexible polymer, the sodium alginate can be intertwined with the aramid nano-fiber in the aspect of physical action, the strength and the toughness are improved through the mutual cooperation of chemical and physical actions, and meanwhile, the insulation performance of the material is improved due to the fact that the structure is more compact.
Mechanical property tests are carried out on the aramid nano paper prepared in the embodiments 1 to 4 of the invention, and the test results show that: the tensile strength of the aramid nano paper is 214-308.23MPa, and the toughness is 12.95-42.33MJ/m 3 The breakdown strength can reach more than 71.71kV/mm.
The above-described embodiment is only one of the embodiments that can implement the technical solution of the present invention, and the scope of the present invention is not limited by the embodiment, but includes any variations, substitutions and other embodiments that can be easily conceived by those skilled in the art within the technical scope of the present invention disclosed.
Claims (8)
1. The preparation method of the aramid nano paper is characterized by comprising the following steps of:
mixing aramid fiber, dimethyl sulfoxide, alkali liquor and polymer solution to obtain nano-level uniform mixed fiber suspension;
carrying out reprotonation treatment on the uniformly mixed fiber suspension to obtain uniform micro-nano fiber dispersion liquid;
preparing the aramid nano paper by using uniform micro-nano fiber dispersion liquid;
the polymer solution is sodium alginate solution; the sodium alginate solution is obtained by dissolving sodium alginate in water and uniformly stirring and mixing; wherein the concentration of the sodium alginate solution is 1-20mg/mL;
the process for preparing the nano-scale uniform mixed fiber suspension comprises the following steps:
mixing aramid fiber, dimethyl sulfoxide and alkali liquor to obtain a mixed system;
adding a sodium alginate solution into the mixed system, stirring to be dark red, and cracking aramid fibers to obtain the nano-level uniform mixed fiber suspension; wherein the stirring speed is 500-1000r/min, and the stirring time is 36-72h.
2. The preparation method of the aramid nano paper as claimed in claim 1, wherein the mass ratio of the aramid fiber, dimethyl sulfoxide, potassium hydroxide and polymer solution is 1:1.5:500: (0.005-0.1) in the above ratio.
3. The method for preparing the aramid nano-paper as claimed in claim 1, wherein the aramid fiber is one of para-chopped aramid fiber, para-fibrid, para-pulp fiber and para-aramid yarn.
4. The preparation method of the aramid nano-paper as claimed in claim 1, wherein the re-protonation treatment process is carried out on the uniformly mixed fiber suspension, and specifically comprises the following steps:
adding deionized water into the uniformly mixed fiber suspension, and stirring to remove foams to obtain uniform micro-nano fiber dispersion liquid; wherein the volume ratio of the uniformly mixed fiber suspension to the deionized water is 1 (3-5).
5. The preparation method of the aramid nano paper according to claim 1, characterized in that the uniform micro-nano size fiber dispersion is used for preparing the aramid nano paper, and the preparation method specifically comprises the following steps:
and carrying out vacuum-assisted suction filtration and drying on the uniform micro-nano fiber dispersion liquid to obtain the aramid nano paper.
6. The preparation method of the aramid nano paper according to claim 5, wherein the vacuum-assisted suction filtration process comprises squeezing a uniform micro-nano fiber dispersion liquid at room temperature; drying at 100-110 deg.C for 5-10min.
7. The preparation method of the aramid nano-paper as claimed in claim 1, wherein the alkali solution is potassium hydroxide solution or potassium tert-butoxide solution.
8. The aramid nano paper is characterized by being prepared by the method for preparing the aramid nano paper according to any one of claims 1 to 7; the tensile strength of the aramid nano paper is 214-308.23MPa, and the toughness is 12.95-42.33MJ/m 3 The breakdown strength was 71.71kV/mm.
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| CN113737306B (en) * | 2021-09-07 | 2022-05-17 | 华南理工大学 | Aramid fiber micro-nano fiber with dendritic structure prepared by double-jet method and application thereof |
| CN115787344A (en) * | 2022-11-17 | 2023-03-14 | 四川大学 | Preparation method of high-strength, high-thermal-conductivity and high-heat-resistance insulating aramid nanofiber composite paper |
| CN116023115B (en) * | 2022-12-01 | 2024-01-05 | 武汉中科先进材料科技有限公司 | Silicon aerogel-nanofiber composite membrane and preparation method thereof |
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| CN111218841A (en) * | 2019-11-28 | 2020-06-02 | 陕西科技大学 | Nano aramid paper-based material and preparation method and application thereof |
| CN112553946A (en) * | 2020-11-26 | 2021-03-26 | 华南理工大学 | High-performance aramid fiber composite paper base material and preparation method and application thereof |
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